refactor(lsp): Improve LSP Server and Component Architecture

[tembleking]

This pull request introduces a series of refactorings to improve the structure, testability, and robustness of the LSP server and its related components.

Key changes include:

• Centralized command execution and error handling within the LSP server.
• Implemented the command pattern for LSP actions, organizing them into distinct modules.
• Extracted the LspServer into its own module for better separation of concerns.
• Improved the component factory and LSP server lifecycle management.
• Introduced mockall to enhance testing capabilities.
• Used a trait for ComponentFactory to allow for easier mocking and dependency injection.
• Addressed clippy warnings by deriving Default for test helper structs.